This release fixes a compilation error of `constriction` in `no_std` mode. It does not affect `constriction`'s behavior in default mode.
It turns out the `probability` create doesn't seem to work in `no_std` mode, so we have to provide mock replacements for the two (tiny) traits from `probability` on which we rely when compiling in no-std mode. When compiling in default mode we continue to use the original traits so that `constriction` can be used together with `probability`.
This release is not a breaking change because it only changes behavior in `no_std` mode, in which, as it turned out, the previous releases didn't compile anyway.